In this week's 1up show, Street Fighter IV is showcased. I'm still downloading it myself, but it supposedly looks really good. Here's the link:

.WMV: http://zdmedia.vo.llnwd.net/o1/1UP/1...iv_640x360.zip

Quicktime: http://zdmedia.vo.llnwd.net/o1/1UP/1...sfiv_quick.zip